Double-walled compartment for high altitude aircraft



Jan. 6, 1942. E, KQLLAND I 2,269,209

DOUBLE-WALLED COMPARTMENT FOR HIGH ALTITUDE AiIQCRAFT Filed Nov. '7, 1958 v Wm Patented lau. 6, 1942 UNITED STATES PATENT OFFICE DOUBLE-WALL OOHPARTIEN'I' FOR I HIGH ALTITUDE AIRCRAFT Koiland, Beriin-I I ohanniathal, Germany assignmto the firm: Henlchel l lngaeng werke A. G., Schonei'eld, Kreis 'leltow Germany Applicatignflovemher 'i, 1038,

Serial No. 239,383

Germany November 15, 937

The present invention improvements in double-walled compartmentsfor high.

altitude aircraft.

In aircraft to be flown at high n w. it is necessary to provide the compartments used by the crew and the ers with an internal pressure which corresponds approximately to atmospheric presure at the surface'of the earth. These compartments have thus been provided with double wallsvin order to obtain hymeans ofsuch walls and ry parts used for stillsection to a minimum. The hexagonal double panes are-preferably made as a uniform turalunitforcomposingthewindow,sothat unit of the composite window-can readily be replaced. One mode of execution of the invention is shown by way of example in theaccompanying drawing:

Figure'lshowsalightpermeablewallsecflen I for the pilot's compartment and at the i'ront end ofthiscomparhnentanenclosurecondstingofa large number of hexagonal panes, and

euing the walls, greater security for the inmates of the aircraft. Moreover the hollow space enables a pressure to be maintained inside the compartment which difiers from the pressure on the outside,'and it also provides meansfor adequate heating of the compartment. For the purpose of looking out and the admission of light, small circular windows withdouble panes have been proposed, which'are fitted to the two walls of the compartment. Owing to their small area, however, these windows fulfil their purpose.

onlytoaninsuflicientextent.

If windows are used which have a comparatively large area and these windows are adapted to the stream-line shape of the compartment,

strongly arched windows have to be used in places, and as double panes are required for their construction, refraction of the light occurs to'suchanextentthatthe teoftheaircraft obtains only a blurred and distorted impresslon of the objects outside.

According to the invention the above incon- .venience is avoided by forming the parts of the walls which are permeable to light or preferably transparent and of comparatively large area, of a large number of hexagonal flat double panes of such size and so arranged, that the composite fields form a section of the wall which is substantially in alignment with the stream-line shape of the 4 compartment. Th hexagonal form serves to reduce the optically obtuse surfaces within the tt area of the wall Figure 2 shows an individual double-paned hexa onalumtorthekindiisedmmmnei.

Intheseflguresl'indicatesapartotthecompartmentot a high altitude aircraft, 2 partof thewing,and l arow of windows ofthepilot's The approximately stream-line shape of the light'permeable or t wall part of the cut l is obtained in a particularly sat- Double-walled compartment forhigh altitude,

' aircraft having a heatable hollow space in the compartment wall, a portion ofsaid wall being archedinfashionandformingafulk view pilot's compartment of t 'or light permeahlematerlaisaidlatterwallporflcnof the pilot's compartment being ofra plurality of flat hexagonal double panes'ionningmultiplefleidswhicharesoeonstitutedtmt they form uniform structural units which can readily be exchanged.

EMIL KOLLAND. 

